[PATCH] D53524: [ThinLTO] Enable LTOUnit only when it is needed

[Teresa Johnson via Phabricator via cfe-commits]

tejohnson updated this revision to Diff 172181.
tejohnson added a comment.

Address comments:
Promote -flto-unit to clang driver option (and test it)
Adjust LTOVisibility.rst to reflect change of default and new option.


Repository:
  rC Clang

https://reviews.llvm.org/D53524

Files:
  docs/LTOVisibility.rst
  include/clang/Driver/CC1Options.td
  include/clang/Driver/Options.td
  include/clang/Driver/SanitizerArgs.h
  lib/Driver/SanitizerArgs.cpp
  lib/Driver/ToolChains/Clang.cpp
  test/Driver/lto-unit.c

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